Other mistake: When Chester is taking Jacko's pipe, Nelson gets up out of his seat. When they show Jacko really really mad, you can look in the background and Nelson is sitting down. When they show him again he is out of his seat.
Dude, Where's My Car? (2000)
1 other mistake - chronological order
Directed by: Danny Leiner
Starring: Seann William Scott, Jennifer Garner, Ashton Kutcher, Marla Sokoloff
Continuity mistake: In the beginning of the movie, the pan of the house shows the lava lamp on. While the camera is on Jesse, the lamp is off, and when it leaves him, the lamp is on again.
More trivia for Dude, Where's My Car?